242112421 has 16 divisors (see below), whose sum is σ = 272442240. Its totient is φ = 214030080.

The previous prime is 242112407. The next prime is 242112439. The reversal of 242112421 is 124211242.

It is a cyclic number.

It is not a de Polignac number, because 242112421 - 2⁵ = 242112389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242112461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11161 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (17027640).

Almost surely, 2^242112421 is an apocalyptic number.

It is an amenable number.

242112421 is a deficient number, since it is larger than the sum of its proper divisors (30329819).

242112421 is a wasteful number, since it uses less digits than its factorization.

242112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596.

The product of its digits is 256, while the sum is 19.

The square root of 242112421 is about 15559.9621143498. The cubic root of 242112421 is about 623.2644509723.

Adding to 242112421 its reverse (124211242), we get a palindrome (366323663).

The spelling of 242112421 in words is "two hundred forty-two million, one hundred twelve thousand, four hundred twenty-one".